Care And Maintenance; Troubleshooting - Hilti TEMD20 Operating Instructions Manual

-CAUTION-
When retracting the water leg, take care to ensure that
no parts of the body are pinched between the moving
part and the fixed part of the water leg.This presents a
risk of injury!
7.2 Finishing drilling
1. Pull the drill steel and drill bit out of the hole while the
tool is still running.
2. Switch off at the ON / OFF switch.
3. Close the water valve on the water leg.
Removing the drill bit: Lay the drill steel down flat on a
hard surface so that the full length of the drill bit is in con-
tact with this surface. Strike the side of the drill bit with
a hammer several times while rotating the drill steel
between each hammer blow. The hammer blows should
cause the drill bit to be released from the drill steel. Take
care to avoid damage to the drill steel.
-CAUTION-
Take care to ensure that no persons in the vicinity are
injured when removing the drill bit.

8. Care and maintenance

Disconnect the supply cord plug from the mains socket.
8.1 Care of insert tools
Remove any dirt adhering to the surface of the insert
tools and protect them from corrosion by rubbing them
with an oily cloth from time to time.
8.2 Care of the tool
The outer casing of the tool is manufactured from impact-
resistant plastic. The grip section is manufactured from
synthetic rubber.

9. Troubleshooting

9.1 Explanation of the operating status / service indicator lamps
The tool is equipped with two lamps which indicate its operating status or faults by lighting in different ways:
Fault indicator Ready and
(red lamp) service indicator
(green lamp)
Off Off
Off Lights
20
Printed: 08.07.2013 | Doc-Nr: PUB / 5071280 / 000 / 01
-NOTE--
The following information printed on the grey background
has to be generally respected for all tools and in all envi-
ronsments.
Check all external parts of the tool for damage at regu-
lar intervals and check that all controls operate fault-
lessly. Damaged plastic parts of the housing must be
replaced immediately due to their explosion protection
function.
Use a slightly damp cloth to clean the outside of the tool
at regular intervals. Always keep the grip sections of the
tool free from oil and grease. Do not use cleaning agents
or polishes, etc., containing silicone.
Keep the chuck clean. Check the drill steel for damage
and wear at the grooves and ensure that the water pas-
sage is not obstructed.
Do not operate the tool when parts are damaged or when
the controls do not operate faultlessly. If necessary, have
the tool repaired at a Hilti service centre.
Electrical sections of the tool may be repaired only by
trained electrical specialists.
8.3 Maintenance of the tool
Regular maintenance is necessary in order to ensure that
the tool remains ready for use when required. After a pre-
set number of operating hours, the operating status lamp
(green lamp) begins to blink. The tool may continue to
be operated for some time in this state. The tool will final-
ly switch itself off after the set service interval is exceed-
ed by more than 10%.
The tool must be serviced at an authorized Hilti service
center.
Repairs to the tool and plug / socket system are sub-
ject to restrictions concerning approval and explosion
protection and therefore may be carried out only by
skilled specialists authorized by Hilti.
8.4 Checking the tool after care and maintenance
After care and maintenance work, the specified checks
and inspections must be carried out and documented
accordingly.
Tool status
The tool is not ready.
The tool is ready for operation.
Cause / action required
No electric power.
See "Troubleshooting"